import axios from "axios";
import { Notification, MessageBox, Message, Loading } from "element-ui";
import { getToken } from "./auth";
import errorCode from "./errorCode";
import { tansParams, blobValidate } from "./ruoyi";
import cache from "../plugins/cache";
import { saveAs } from "file-saver";
// 引入第三方解决后端返回精度丢失问题
import JSONbig from "json-bigint";
import qs from "qs";
let JsonBigInt = JSONbig({ storeAsString: true });

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers["Content-Type"] = "application/json;charset=utf-8";

// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 1000 * 60 * 10,
  // 精度丢失改的就是下面这部分
  transformResponse(data) {
    try {
      return JsonBigInt.parse(data);
    } catch (err) {
      return data;
    }
  },
});

// request拦截器
service.interceptors.request.use(
  (config) => {
    // 是否需要设置 token
    const isToken = (config.headers || {}).isToken === false;
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;

    console.log(isRepeatSubmit);

    // if (getToken() && !isToken) {
    //   config.headers["Authorization"] = "Bearer " + getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
    // }
    // get请求映射params参数
    if (config.method === "get" && config.params) {
      let url = config.url + "?" + tansParams(config.params);
      url = url.slice(0, -1);
      config.params = {};
      config.url = url;
    }
    if (
      !isRepeatSubmit &&
      (config.method === "post" || config.method === "put")
    ) {
      const requestObj = {
        url: config.url,
        data:
          typeof config.data === "object"
            ? JSON.stringify(config.data)
            : config.data,
        time: new Date().getTime(),
      };
      const requestSize = Object.keys(JSON.stringify(requestObj)).length; // 请求数据大小
      const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
      if (requestSize >= limitSize) {
        console.warn(
          `[${config.url}]: ` +
            "请求数据大小超出允许的5M限制，无法进行防重复提交验证。"
        );
        return config;
      }
      const sessionObj = cache.session.getJSON("sessionObj");
      if (
        sessionObj === undefined ||
        sessionObj === null ||
        sessionObj === ""
      ) {
        cache.session.setJSON("sessionObj", requestObj);
      } else {
        const s_url = sessionObj.url; // 请求地址
        const s_data = sessionObj.data; // 请求数据
        const s_time = sessionObj.time; // 请求时间
        const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
        if (
          s_data === requestObj.data &&
          requestObj.time - s_time < interval &&
          s_url === requestObj.url
        ) {
          const message = "数据正在处理，请勿重复提交";
          console.warn(`[${s_url}]: ` + message);
          return Promise.reject(new Error(message));
        } else {
          cache.session.setJSON("sessionObj", requestObj);
        }
      }
    }
    return config;
  },
  (error) => {
    console.log(error);
    Promise.reject(error);
  }
);

// 响应拦截器
service.interceptors.response.use(
  (res) => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode["default"];
    // 二进制数据则直接返回
    if (
      res.request.responseType === "blob" ||
      res.request.responseType === "arraybuffer"
    ) {
      return res.data;
    }
    if (code === 401 || code === 700) {
      return Promise.reject("无效的会话，或者会话已过期，请重新登录。");
    } else if (code == 701) {
      Message({ message: msg, type: "error", duration: 5 * 1000 });
      return;
    } else if (code === 500) {
      Message({ message: msg, type: "error" });
      return Promise.reject(new Error(msg));
    } else if (code === 601) {
      Message({ message: msg, type: "warning" });
      return Promise.reject("error");
    } else if (code !== 200) {
      Message({ message: msg, type: "error" });
      return Promise.reject("error");
    } else {
      return res.data;
    }
  },
  (error) => {
    console.log("err" + error);
    let { message } = error;
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (message.includes("timeout")) {
      message = "系统接口请求超时";
    } else if (message.includes("Request failed with status code")) {
      message = "系统接口" + message.substr(message.length - 3) + "异常";
    }
    Message({ message: message, type: "error", duration: 5 * 1000 });
    return Promise.reject(error);
  }
);

// 通用下载方法
export function download(url, params, filename, formData = true) {
	let user = JSON.parse(window.localStorage.getItem("user"));
  return service
    .post(
      url,
      params,
      formData
        ? {
            transformRequest: [
              (params) => {
                return qs.stringify(params);
              },
            ],
            headers: {
              user: user.data,
              iv: user.iv,
              key: user.key,
            },
            responseType: "blob",
            timeout: 0,
          }
        : {
            headers: {
              user: user.data,
              iv: user.iv,
              key: user.key,
            },
            responseType: "blob",
            timeout: 0,
          }
    )
    .then((data) => {
      console.log("data", data);
      // 如果返回的结果是json格式，将blob转成json
      if (data.type === "application/json") {
        //此时返回的data为blob格式
        const file = new FileReader(); //读取文件
        file.readAsText(data, "utf-8"); //读取文件，并设置编码格式为utf-8
        //在读取文件操作完成后触发
        file.onload = () => {
          let pbres = JSON.parse(file.result);
          if (pbres.code && pbres.code != 200) {
            this.$message.error(pbres.msg || "未知错误，请联系管理员");
          } else {
            // vm.$download.name(pbres.msg);
            console.log(pbres.msg);
          }
        };
      } else {
        const content = data;
        const blob = new Blob([content]);
        if ("download" in document.createElement("a")) {
          const elink = document.createElement("a");
          elink.download = filename;
          elink.style.display = "none";
          elink.href = URL.createObjectURL(blob);
          document.body.appendChild(elink);
          elink.click();
          URL.revokeObjectURL(elink.href);
          document.body.removeChild(elink);
        } else {
          navigator.msSaveBlob(blob, filename);
        }
        this.$message.success("导出成功");
      }
    })
    .catch((r) => {
      console.error(r);
    });
}

export default service;
